Major Sewer Improvement Effort

Major Sewer Improvement Effort

Current Improvement Projects

The North Rillito Interceptor (NRI) project

The North Rillito Interceptor (NRI) project is approximately 10 miles long. The NRI is a large diameter pipeline that transports wastewater from the City’s far east side in the Woodland Road and Bear Canyon area, along the north bank of the Tanque Verde Creek and Rillito River, to the Ina Road Wastewater Treatment Facility -- which serves a major portion of northern and eastern Tucson.

Although there are no immediate plans to increase the NRI’s capacity due to limited density growth, the RWRD must comply with U.S. E.P.A. guidelines relating to wastewater system capacity, management, operations and maintenance and to minimizing the number of sewer overflows.
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The North Rillito Interceptor Relief project

The North Rillito Interceptor Relief project will connect the NRI and the SRI in the Columbus Boulevard area. Ultimately this new connection allows the RWRD to convey 10 million gallons of wastewater a day, reducing the potential for sewer overflows and ensuring compliance with U.S.E.P.A. guidelines for capacity, management, operations and maintenance.

Construction of the new NRI Relief facilities requires heavy civil work related to excavation required for structures and the sewer siphon from the north bank to the south bank of the Rillito River.
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The South Rillito Interceptor (SRI) project (Completed)

The RWRD’s South Rillito Interceptor (SRI) is another major interceptor with additional capacity that runs along the south side of the Rillito River, parallel to the NRI. The SRI rehabilitation project begins in an area near Columbus Boulevard and runs west for 3.9 mile along the south bank of the Rillito River to the intersection of Roger Road and Tucson Blvd.
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Construction & Traffic Alerts

TANQUE VERDE AND WOODLAND
Tanque Verde Lane Restrictions Rescheduled
Jul 30, 2015

TANQUE VERDE, PANTANO TO WOODLAND
Tanque Verde Lane Restrictions
Jul 22, 2015

TANQUE VERDE, PANTANO TO WOODLAND
Lane Closures on Tanque Verde
Jul 10, 2015

MISSION ROAD & IRVINGTON PLACE
Emergency Sewer Repair to Close South Mission Road
Jul 2, 2015

CRAYCROFT BETWEEN RIVER & SWAN
Lane Changes on Craycroft
Jul 2, 2015

RILLITO RIVER & SWAN ROAD
Rillito River Path Detour
May 6, 2015

NORTH COLUMBUS BOULEVARD
NRI Relief Project - Letter to Neighbors
Apr 24, 2015

CRAYCROFT BETWEEN RIVER & GREGORY
NRI Traffic Alert
Apr 21, 2015

Pima County